27489645 has 16 divisors (see below), whose sum is σ = 48870720. Its totient is φ = 14661072.

The previous prime is 27489643. The next prime is 27489659. The reversal of 27489645 is 54698472.

It is a happy number.

It is not a de Polignac number, because 27489645 - 2¹ = 27489643 is a prime.

It is a super-3 number, since 3×27489645³ (a number of 23 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 27489645.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27489641) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 101679 + ... + 101948.

It is an arithmetic number, because the mean of its divisors is an integer number (3054420).

Almost surely, 2^27489645 is an apocalyptic number.

It is an amenable number.

27489645 is a deficient number, since it is larger than the sum of its proper divisors (21381075).

27489645 is a wasteful number, since it uses less digits than its factorization.

27489645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 203641 (or 203635 counting only the distinct ones).

The product of its digits is 483840, while the sum is 45.

The square root of 27489645 is about 5243.0568373803. The cubic root of 27489645 is about 301.8026465230.

The spelling of 27489645 in words is "twenty-seven million, four hundred eighty-nine thousand, six hundred forty-five".